Typewriting machine



June 2, 1931. G. H. MYERS A'IYPEWRITING MACHINE A Filed June 2. 1928 2 Sheets-Sheet l lNVENTOR.:

ww IQ June 2, 1931. G. H. MYERS TYPEWRITING MACHINE Filed June 2. 1928 2 Sheets-Sheet 2 Patented June 2, 1931 Unire-n sra'rssPAreNr cyr-Fica GEORGE n. MYERS, or Bainenrona, CONNECTICUT, Assieivon To Uimnnwoon ELLIOTT FIS-HER COMPANY, GF NEW YORK,

N. Y., A CORPORATION OF DELAWARE TYriiwn-irrne MACHINE Appncation sied .nite a,

The present invention relates `generally to ribbon-feeding mechanism of typewriting machines, vand more particularly to means for automatically reversing the ribbon-feed of Aa portable typewriting machine.

i 'force to appreciably increase 'theusual resistance of the keys to the touch.

YIn carrying out my inventionY in an Underwood portable typewriter, the keys are operlative'ly connected to the usual ribbon-feed- -reversing mechanism when the ribbon reaches a vpredetermined point. A pivoted carrierlmember associated with each spool is operatively connected to a usual oscillating lever, which operates a drive-pawl for rotating a 1.. coaxial ratchet-wheel fastened to the spool.

A normally-ineffective actuator-lever is pivoted on each oscillating carrier, and the lever associated with l,the feeding spool is movable to a position by the ribbon, wherein it lis effective upon the next oscillation of the carrier to rotate a cam, whichwill connect the associated ratchet-wheel and its released pavvl. The lever is -moved to effective position by a lever-system which is operated by the ribbon when-the latter has bee-nsubstantially unwound fromthefeeding spoolI The .next depression of a key reverses theribbonfeed mechanism, because the two pawl-controlling cams are connected as usual,so that when the pawls of one spool are made effective for rotating the spool ahead, the pawls ofthe other spool are disabled to permit that .spool to be reversely rotated for unwinding the ribbon therefrom. ,K c

It is another feature of the invention to assemble, as a unit, the ribbon-control mechanism .and the key-operated mechanism for .each spool on a single bracket which is easily .mounted on the usual shift-frame.

It is still another feature of the. inven- 1'928. Serial No. 282,303.

tionl to provide a detent-device on one of the pawl-disconnecting cams, which devicel is also effective to help considerably .in moving the cams to the Vend `of their travel infeither direction. This detent-de'vice replaces Vthe usual detent-device. heretofore used with ,the inanually-operated Vfeed-reversing mechamsm.

Other features and advantageswill here- Y inafter appear.

ln .the accompanying drawings,

Figure lis a fragmentary sectional view, front to rear,of an Underwood portable typeWri-ting .machine, having my invention applied thereto. Y 'Y V Y Figure 2 is a. fragmentary cross-section through `the mechanism associated on the right-hand ribbons'spool, :the cross-section being taken at a substantialright angle to the .plane of the section in'Figure l, and certain parts lbeing shown in elevation.

Figure 3 is a fragmentary perspective vview of a unitary mechanism-ofthe invention for controlling` the reversing oftheribbon-feed mechanism movement ofthe ribbon. V

Figure 4 is a fragmentary plan'kview of the ribbon-spools of the present invention, and certain associated parts which illustrate how the ribbon-feeding mechanism of one spool operates reverselj7 from the other spool. In this view the left-hand spool is disposed for winding up the ribbon, and the otlierspool is feeding out the ribbon.

Figure 5 is a fragmentary perspective view of the right-hand ribbon-spool and the as- -I i sociated mechanism of the present invention` y for automatically reversing the ribbon-feed. ln this view the ribbon isshown substantially unwound from the spoel, and a button 011 out to engage the reversing the ribbon is ab mechanism. s l Figur-e 6 lis a view similar to Figure '5,the ribbon having moved a trip-leverand ain actuator-setting mechanism to .eective positionV for operating the reversingY cam at ,the nei-:t dep 1essicn of the typewriter-key.

Figure 'Z' is a view similar to Figure, the

actuator, which is operatively connected vto Y the universal bar, being shown in ,o-perated position wherein itl has moved the` reversing cam-plate clear of the drive-pawl, the latter being now in operative engagement with the ratchet-wheel of the ribbon.

The present invention is illustrated in connection with an Underwood portable typewriting machine .in which keys are fastended on key-levers 11, each of which is .piv-

oted on a lateral rod 12, fast to a main frame not shown, and 'depression of its corresponding key 10 causes it to be swung rearwardly against a platen 22 Vmounted on a `shaft 23 journaled in a carriage 24. yA spring 25 returns each lever 11, and its associated type-bar 14, to'normal positionrafter 4each type-stroke. The parts described hereinbefore maybe of usual construction. Y

Upon depression of a key 10 the platencarriage is letter-spaced from right to left by usual instrumentalities, not shown, and the lever 11 associated with the key Vis swung downwardly against a universal bar 26, which is disposed a short distance below the lever and is mounted for oscillation on a rockshaft 27. The lever is normally urged upward against a stop-pin 29 by a-contractile spring 28.

lnterponents, not shown, operatively connect the universal bar 26to a ribbon-vibrator 30, through which a ribbon 31 Ais threaded in the usual Way, the vibrator being vibrated upwardly in front of the printing point just before a type 32 on a type-bar 14 Vstrikes the platen. The construction of the universal bar 26,'the vibrator 30 and the interponents connecting the latter to the bar may be the same asdisclosed in the co-pending application of l rotatably mounted on 47 'of the usual shift-frame.

,TNilliam A. Dobson, No. 67,297, tiled November 6, 1925 (now PatentNo. 1,715,906, dated June 11, 1929).

It is usual in typewriter construction to`V have the ribbon 31 reeled on two spools 40, different sides of the printing point for winding the ribbon alternately from one spool to the other through the vibrator, asmall amountv at each type-stroke. 1n the present Vinvention* each spool `is journaled on the upper portion of a vertical spindle 41', th lower portion of which is journaled in a vertical bushing-member 42, and is held therein by a screw 43 in the lower end of the spindle. Thumb-nuts 44 hold the spool in place onthe spindle 41. The bushing 42is rotatably mounted on a bracket 45, which rmay have the form of a Ashort section of rectangular tubing, which may be fastended by screws 46vto an adjacent side plate A cam-plate,

Va thin inreaehing. arm 49 generally designated as 48, is fastened to the upper end of eachbushing 42 for a purpose to appear hereinafter. Between the camplate and the top of the bracket 45 is disposed which is pivoted about the bushing 42 for a purpose to presently appear. Y

A usual ratchet-wheel 50 is loosely mounted on each spindle 41 between the cam-plate 48 and the ribbon-spool 40, being spaced away from the spool and the cam-plate by usual hubs. A usual up-reaching pin, not shown,V

on each ratchet-wheel releasably engages in a hole, not shown, in the associated ribbonspool, and operatively fastens the latter to its ratchet-wheel.

To the end that a small amount of ribbon 31niay be wound on either of thespools 49,

and off the other, each time a characteris i typed, two` Lip-reaching arms 51 are fastened on therock-shaft 27, one arm being disposed adjacent eachside plate 47. A forwardly and upwardly extending link 52 connects the upper end of each arm 51 to the lower end of an upright lever 53, which is pivoted about a screw 54 threaded Vin the inwardly-disposed wall of the adjacent bracket 45. A short portion of the upper end of each lever 53 is bent inwardly to form a wrist-member 55, f

which has an open slot 56 for engaging about a depending pin 57 fastened to the arm 49.

A drive-pawl 6() is pivotally mounted on the outer end of each arm' 49, and has an upreaching tooth 61 for engagement with the adjacentl ratchet-wheel toward which it is urged vby a contractile spring 62, which has oneend fastened to a depending lug 63 on the pawl 60, and the other end to a depending lug 64 on the arm 49. Y

As will appear hereinafteiyone of the drivepawls is always disposed in effective position, and the other pawl is always in ineffective position. The depression of any key 10 will be effective Vto oscillate each of the pawls 60 onthe arms 49, and will therefore rotate step by step the ratchet-wheel 5() associated with the effectively-disposed pawll The, construction of thetlrive-pawls may be substantially the sameas is set forthf in the patent to Lee S. BurridgeyNo. 1,249,022, dated December 4,1917. l i r 1 To prevent reverse movement cfa ratchetwheel 50 while being "driven ahead'by its ward the ratchet-wheel by a-contractile spring V67, which has one end fastened to a depending lug 68 on the dog-pawl and the other endfastened to the'adjacent side plate.v

The ratchet-wheel 50 and the' pawls 60 and Y are oppositely disposed, and it is necessary to hold the pawls of one spool in ineffective positions while the ribbon is being un-V wound from the spool associated with the ineffective pawls. To -.this=end, each cam-plate 48 has two radial arm-members 70 and 7l arranged with cam-edges 7 2 .effective upon rotation of the `cam-plate for camming kthe pawls and 65, respectively, awayfrom the ratchet-wheel associated with -the screw from which the'ribbon iszbeing wound. The principle of `operationfef .the cam-plate is more fully explainedin the above-noted patent to Burridge. j To arrange for one set of pawls 60 vaiicli to be moved 'by spring-action to eective positions simultaneously :as the other set of pawls is cammedto ineectine positions, a forwardly-extending .arm 73 may he fastened securely, as by clamping, .to thelower end of each bushing` 42 which prctrudes below the bracket 45, and the forward ends of the arms are operatively connected by a ,substantially vUsshaped'connecting link 74 of sti wire'.4

The upper end-portion `of each upright member of the Usshaped link is bent Iat a right angle rearwardly and then downwardly. Each downwardly-bent end portion 75V of the link engages loosely in a vertical hole in Athe forward end ofthe adjacent arm 73. This construction permits .a horizontal base-.portion 76 of the link 74 to be `dispose-d Vbeneath the forward ends of the type-bar 14.

To the end that .the feed of the ribbon 3l may be manually lreversed at will, an upwardly-extending lever 77 is pivoted on a screw 7 8 aga-inst the inner face of a front plate 8O and adjacent 4`the right side of the l machine. The lever is bent forwardly at A8l for passing through a slot 82 `inthe front plate, .and is bent upwardly again at`83 to .have its upper portion compactly.disposed against the forward faceof the frontplate, the lever terminating in aball 84. An arm 85 isc fastened rigidly to thelever 77 between its pivot and the slotr82, and extends rearwardly and terminates in two integral forks 86,*which engage on either side of the right hand upright member of the U'-shaped link 7 4. As illustratcdin-Figure 4. the lever 77 is thrown to the right and the pawls of the righthand spool 40 are disposed in ineffective positions. For a reason to appear hereinafter, the lever 77 is preferably mounted to move .freely about its pivot, and engages no detentdevice, as employed heretofore, for holding it inits rightmost or leftmost position. To the end that the feedof the ribbonl3l from either ribbon-spool to the other may be V.right-hand spool, it being understood that a similar mechanism 1s ,provided `for .the other y spool. EQnebutton` isp`ositioned adjacent each `end of :the ribbon a distance adjacent therefrom:thatpreferably will leave approxiymately one turn vof theribbon wound around a usualcore 94 ofthe adjacent :spool when .the .buttonmoving-wi-th the ribbon, towards :the vibrator `30, has passed .through .a slot .92 -oflthe .usualribbon-:spool ;cup. 93 and .engaged against the upperend Vof alever 94,`herein :aft-er called `a .tr-ipflever.

This lever has its lower endpivoted on a vriveti942L Lin Ya .bracket-arm 95 of the main bracket, .generally ...designated as .9.6, :which .mayioe Vfastened byaplnrality of screws 97 to theadjacentside iplat'e'47. `Itwill :be noted (Figures .v4.and :6) thatthe lower .end Aportion of thetripflever94 has an integnal .fl-angemember 98, which isi-bentV transversely tothe -planeof the trip-lever..- The face of this :flange is disposed-against a faceof an .outer -endpontion199 ofthe bracket-arm95, which y 'ribbon lessened. In the ineffective position `ofthe'trip-lever, as illustrated in Figure .5, it-supper end-isdisposed compactly against the ribbon-spool cup., -`a lengthwise slot "100 in.thetrip-leverV registers with the slot '-92infthe'cup93.. f y

`Itiis :Eeatureof the presentinfvention to reverse the ribbon-feed. by :power created by Vthe depressioniof akeyllO .by immediately vfollowing-.the movement ofthe trip-lever 94 .to .effective position. '.For .transmitting this .powerto the hereinafteredescribed means employed for movingt'hereversing cam-plates 448,useis-made ofthe lever 53, which is oscillated .ateachfoperat'ion of xa key 10.V An elongated lengthwise slot 101 is provided inthe` .lever 53 a short distance Vbelow its' pivot- :screw 54. A .later'allyedisposed pin 102 has one end .positioned forengaging loosely in the slot 101, and extends therefrom to the right to be fastened: rigidly irn-a part .generally vdesig- -nated asi-103,:and hereinafter .called an actuator-carrler. The carrier may be made from `thin :sheetemetal and have aplane .body-portion 104, whose sidev elevation, asshown in Figurel, .mayhave the approximate form of -a-'rectangleswith -a triangular-section cut out Y of its Vupper left-hand corner.vr f

The carrier 103 is pivotedfor oscillation in a vertical planeparal-lelto thelever 53 -o-n a/shou'lde-r-'screw `105, threaded into the right side. of a forward extension 106 of an -in-reaching bracket-arm 107, disposed above the bracket-'farm 95 :and integrally joinedl to vtheY main bracket 96. A rearwardlyfextending 'stop-finger 108is .integrally joined to the body 104 at its rear lower cornerfandhasfa leftwardv extension 1,110, whichy passes below .the bracket-arm extension'106; This construction iprevents f the actuatorlcarrier from being'swung too .far Clockwise Vabout the pivotfscrew 105V by its own weight, the centerof gravity yof the carrier ybeing disposed in front of a vertical plane through its pivot, as will be .seen from an inspection of Figure 1. i

, The pin 102 is fastened inthe carrier-body portion 104 a short distance below its pivotscrew 105 (FiguresV 1 and3). `-Therefore, each time the lever 53, is swung. forward-by depression of a key 10, the actuator-carrier 103 isrocked counter'clockwise about its pivot-screw. An actuator-member in the form of a thrust-lever'111, for moving the revers'- ing cam-plate 48, is pivotally monntedon a screw 112 in a rightwardly-extending integral flange-member 113 `of thefbody-portion 104, and extends upwardly toward the cam-plate. The lever 111 is urged leftwardly by a contractile spring 114, which has one end fastened to 'a' forwardly-bent integral lug 115 on the lever, and-theother end to an integral lug 116 on the body 104. An integral strap-likelug 117 on the body 104 is positioned above theV screw 112 and extends forward asy far as the 'front face ofy thethrnst-'leveig andis Vbent to the right to extend along in front of the lever fora purpose to'presently appear. The lug 117 also `serves to arrest the lever 111 iniits leftmost kpendinghook-member 118 on the lever 111,

which isarranged lto engage against the left side of the lug 117 when thelever 111 has been moved to its rightmost position by means to be described hereinafter.

To provide an operative connection `between the. cam-plate 48 and the thrust-lever 111V the cam-arm 70 has an integral abutment lug 119 depending from its inner edge. The lug 119 terminates preferably one-fourth inch or more below the top of the lever 111,

ma is disposed to the right VSiae 0iule nor.-

mal path of the upper endof the lever 111, when .the latter is swung to the rear at ordinary type-strokes? .The lug 119 in its forward position is spaced va short distance to the rear of the lever 111.y f l' f To permit'the lug 119Ltorp-ass the underlying pawhcarrying arm 49,.acircumferential slot 120 is cut in the arm, which permits'vibratoryf movement-of the latter, for

" rotating the ratchet-wheel 50, without interference bythe lng 119, and alsoperinits rotary movement of the cam-plate48 independently of the oscillatingarm 49. Thelength of the circular arc ofthe slot 120 exceeds the angular movement of the cam-plate 48 plus that of the arm V49, since at certain times the cam-plate 48 may be moving in the opposite direction to the arm 49. Y Y v To make the movement of theleverf. 94by the button90 effective for moving the actua.-

tor-lever. 111 into positionfor engaging the depending lug119, a Z-shaped transfer lever 121 is pivoted about a screw '122 in an 'upwardly-spaced, rightwardlyfextending, 'integral ange 123 of the bracket-arm extension G. An arin 124 of the lever 121 extends rearwardly adjacent the right side of the lever 94, and has a depending member 125. Since the last-named lever is swung to the left bymovernent of t-he ribbon 31, an integral U-shaped hook 126 is provided onthe lever 94 and extends in a substantially horizontal plane to the rear, past the member 125, then tothe rightpast said member, and then forward past said member again (Figure 3).

`Another arm .127 of the lever 121 extends forward slightly past thelever. 111, and is normally disposed adjacent the left side of its upper end portion (Figure2). When most of the ribbon 31 is unwound from the right-hand spool the button 90 will ymove 'up' against the lever 94, andV at each typestroke thereafter will swing it to the left away from the cup. The arm 127 of the transfer lever 121 is swung to the right andr car- 1.

ries withitlthe lever 111 which is being oscillateditoward the rear at each type-stroke. The ripper end of the lever 111'is thus moved over tof'the right until its path to the rear will intersect the lug 119. Thereupon the next operation of a key 10 causes the lever 4111 to engage the lug 1,19and thrust it rear-` wardly, and swing the arms and 71 clockwise out of engagementwith pawls 60 and 65,'frespcctively', and their respective return springs will swing them into engagement with the right-hand ratchet-wheel 50.

As will be understood from the above explanation ofthe operative connection between thecam-plates' 48 of the right-hand and lefthand ribbon-spools, the pawls of the left-hand spool will bel disabled, i. e., made ineective c'oncoinitantly with the releasing of the pawls of the right-hand spool for effective engage ment with .their associated ratchet-wheel.

A detent-device'generally designated as130 is provided for holding the cam-plate 48 se- .curelyinits effective pawl-releasing position or in-its ineffective position clear ofthe pawls.

This `device includes a short extension 4131 of the plate on the oppositeside ofv its axis from the arms 70 and 71. The outer end of the ex'- tension 131 .is provided with two triangular V-shaped .notches`132- Aball 133 disposed in a` hole 134 the right-hand side plate 47 and pressed by a leaf-spring 135 fastened on the outer face of the side plate, is arranged to lisos-,505

the rear notch vwhen the cams are clear ofV the pawll (Figure 7.)- v n he engagement of the ball` in the notches will yieldingly hold the cani-plate from creeping out of either its effective or ineffective posi-tion, bui; will not pre'mrli-tthe` rotary movement of the cam-plate by the' abovedescribed reversing mechanism. It can also be seen by those skilledl in the art that the co-operation of the spring-pressed ball and the notches provides a further advantage by helping ina wellknown way to move the camplate ineither direction to the end of its travel after the tooth between the notches 182 passes the center of the ball. It will be noted that the detent-device 130 on theright-han'd cam-plate also controls the left-hand camplate through the above-described operative conection between the cam-plates.

The right-hand spool 40, having been made effective for winding up the ribbon 3l, the button 90 will then move toward-the core 91 of the right-hand spool at each type-stroke, and the trip-lever 94 is caused to follow the button closely by a contractile s'pring'137, which has one end fastened to a rightwardlybent integral lug 138 on the lever 94 (Figure 3), and the other'end fastened to a lug139, which is integrally joined to the top edge of the'y bracket-arm 107 adjacent the left end thereof and' eXtendstherefromrto the right, being bent forward enough to bring the line for yforce of the spring 137 nearly parallelto the line of movement of the trip-lever 94. This prevents binding of the lever 94 about its pivot, and makes for easier operation ofthe lever and the actuator-controlling mech'alnism. n

It will be seen upon inspection of Figure 1 that a key-lever 11 Vdoes not strike the universali bar 26 atthe beginning of the down stroke, and" thereforedoes not instantly begin to move the mechanism provided for operating the cams 48.

Y It will be further noted that the top ofthe lever 111 isnormally spaced'a short distance forward froml the lug 119. Thus, when the Alever 11,1 engages the lug, the type-bar 14 associatedwithrthe depressed key 10 will havev already moved overv a large part of its travel toward the printing point, and will have acquired considerable momentum, which will be effectivetliroughf its connection to the lever 53 to help rotatethev cam-plate 48', and! thereby decrease the amount ofthe additional force required, for depressing the key 10, which has to both type the letter and -reversethe ribbonfeed. 1

Variationsmay be resorted to within the scope of the invention, and portions of the improvements may be used withoiit others.

Havingv thus describedv my invention, I claim: i y Y i 1. In a typewrit'ing machine,l theVv combination of a horizontal ribbon-spool at each. side of themachine, instrumentalities for rotating each of said'spools-to wind the ribbon on either spool,v including for each spool a coaxial ratchet-Wheel, a 'drive-pawl, a detent-pawl and a member operatively connected to said drive-pawl and oscillat'edat each type-blow, devices for disabling the rotating instrumentalities for either spool, including a carnmember coaxial: with each spool forv controlling the-pawls thereof, a connection between said?" cams, whereby, when.y the pawls of "one spool are made effective,- the pawls of thev other spool are madei-neff'ective, a normally-ineff festive pivoted device operatively connected to each paWl-driving oscillating member to oscillate therewith for operating the associated cani, and mechanism operated by movement ofV thel ribbon when it is' substantially unwound from one spool tol make the associated pivoted and-'oscillatable device effective l ing' an operative connection to saidle'i'ferfand a normally ineffective lever pivoted on said member for movement to effective position,V

and meansv actuated by the movement` ofsaid ribbon for controllingthe *operation of' said disabliilijg'r?means, said last-namednieans in- @hiding a lever-system effective` for moving said last-named" lever into effective/position. 3l The structure described in claim- 2'v characterized' arranging said oseillatable ineinber for vibra-tion in'- a plane substantially paralleltosaid vibratory lever. f

means including an oscillatable memberhavy 4f. In a ribbon-feed reversi-111gl niechan-isin y for a typewriting machine, a` ribbon-spool',

means for' rotating said-spoel to wind theribbon thereon, incln'dingan upright lever vibrating at each type-blow, anoperative conl nection' between said lever and'f'said spool,

means` for disabling said connection whereby the spool is free to be-reversely ifot-ate'd'ifor fee-ding saidribhon therefrcmsaid disabling means including a rotary cani coaxial" with said spool and a thrust-receiving' lug"v dependiiigfroin saidjcam, an oscillatable` meinber having operative. connection with said lever and a normally-ineffective arinpivoted on the .rneI-nber` for movement i-nto'" effective position to engage with and` move .said vlug, and means actuated: by the movement of the ribbon fori controlling? the operati-on o'isaid disabling means the, ,controlling `means nv posite direction, said ing two oppositely-disposed side-plates', a

, horizontal ribbon-spool supported by.` each side plate, means 'for `rotating, one of said spools ahead for winding up the ribbon there- 1 on, including a ratchet-wheel underlying the ribbon-winding spool and coaxial therewith, a drive-pawl, a' detent-pawl, said pawls engaging said ratchet-wheel,devices for releasing said pawls from yengagement `'with said ratchet-wheel, whereby said ribbonwinding spool isiree to berotated-in the op- -device including arotary plate bearing twocam-edges reffective for moving said pawls out of engagement with said ratchet-wheel, said plate being' coaxial with said ratchet-wheel and having anexf tension on the oppositeside of its axis from said cam-edges, said extension terminating in close proximity to the adjacent side plate and having two Yvertical V-shaped notches cutin its outer edge, said adjacent side plate having .an aperture disposed adjacent said notches, a ball disposed in 'said .aperture whereby the latter serves as a housing for said ball, and a leaf-spring -fastened on the outerA face of said. adjacent side plate and effective tor-pressing said ball in against said extension, said aperture and said notches being Vpositioned relative to said 'cam-edges, so that when the latter are in engagement with said pawls said ball is seated in one of said notches, and when said cam-edges are disposed away from said pawls said ball is seated in the other 'of said notches.` Y

6. Ina device of lthe class described, having a ribbon-spool, mechanism for rotating said spool and a movable device for disabling said rotating mechanism, the combination of an actuator-carrier member.V pivoted for movement in a vertical` plane transverse to the direction of movement of said device,

means-for oscillating said carrier,- an actuator pivotally mounted on said carrier for engagement with said disabling device, so that the oscillation of said carrier moves said actuator transversely to the. direction of movement of the disabling device, and a supporting member fasten said carrier loosely i engaging said actuator between its pivot and its outer end, whereby said outer end may operatively engage said disabling devices and edectively transmit power created by the oscillation of said carrier, said 4supporting; member providing lateral movement vof said actuator', whereby engagement of the latter with said disabling devices 'canbe controlled independently 'of said oscillating means.

-' `7."1he structure described'Vl in claim f6 characterizedfby an arrangement of the axis otsaid carrier below the path of the portion oli said rotatable disabling device, which is pivoted versing the rotation .concomitantly lowe engaged by said Vactuator-member, z whereby said carrier may be coinpactly disposed below the ribbon-spool. V

8. In a typewriting machineof the class described, inv combination, a shift-frame,- a ribbon-spool supported on each side of'V said shift-frame, means for rotating ahead one of said spools at a-time, cams for disabling said rotating means, abracket adjacent each spool on said shift-frame, means -for con-V trolling said disabling devices, including a depending piece on each of said cams, a normally-ineii'ective,oscillating member for engaging said piece, and alever-system mountedas aunit on said bracket, said lever system being operable by movement of said ribbon for moving said' oscillating member toweffective position for engaging said depending piece. Y j

9. In a ribbon-feed reversing mechanism of a typewritingmachind in' combination, a shift-frame, two horizontally-disposed. ribbon-spools on said shift-frame, instrumentalities for. rotating eachV of, said spools aheadalternately, devices for disabling said rotating instrumentalities, a controlling unit effectivev for determining the operation of said .disabling devices upon a predetermined movement of the ribbon, said unit including a bracket mounted onsaid shift-frame, a

trip-lever on said bracket movable by said ribbon, a normally ineffective oscillating member on saidbracket, an actuator-piece on said 'oscillatable member, and/a transfer-lever for vmaking the'movement of said trip-lever eii'ective to move said actu-v ator-piece to position for engaging said disabling devices.

10. "In a typewritiiig machine of the'lclass.

described, having a main-frame, a shiftframe and` forwardly'extending type-bars, .the combination oftwo ribbon-spools, one .on each side of said shift-frame, afpawl and ratchet-wheel device for rotating each of said spools ahead, means for automatically 'reof said -spools Vfor feediiiig the ribbon alternately in opposite directions, said reversing means including a member extending-between the sides of said shiftframe andsupported thereby belowk the for- :1 1 .ward ends of said type-bars, and means effective to raise the pawl of one ratchet-wheel out of operative engagement therewith and r the pawl of the other ratchet-wheel into operative engagement therewith, means for manually reversing the rotation of said ribbon-spools, including-a pivotedlever at the front of said machine supported on said main-frame, and an operative connection-between said pivoted lever and said; member, effective to permit jthe ieed of. said ribbonto be manually reversed irrespective of the automatic means for reversing .the same, said connection also permitting said automatic Areversing means to tir ment to effective position, said strap-piece,

guiding said actuator laterally and supporting it against being forced away from said carrier when engaging said part to be moved.

l2. In a typewriting machine, the combination with a set of keys, a ribbon-spool rotatably supported on the machine, a paWland-ratchet mechanism associated With the spool to feed the ribbon, and a cam for controlling the operation of said feeding mechanism, of a device for setting the cam into effective and ineffective positions, including a pivoted oscillatable element actuated by each stroke of the keys, a lever between the oscillatable element and the keys for rocking the element through a greater angular amplitude than that of the lever, said element moving normally in ineifective positions for movably engaging said cam, and means op- `erable by the movement of said ribbon for moving the element into effective positions for moving the cam to control the ribbonfeed. GEORGE H. MYERS. 

